Question about Lollipop and Bluetooth

I'm not exactly sure if this is the right forum, but since I have a note 4, here goes:

Since Lollipop will allow Bluetooth devices to keep the phone unlocked when in close proximity, and since I don't want to shell out a ton of money for a watch, is there a Bluetooth device I could just clip to my key ring that would work? Something that would not need to be charged up every day like my Bluetooth headset does?

I'm not exactly sure if this is the right forum, but since I have a note 4, here goes:

Since Lollipop will allow Bluetooth devices to keep the phone unlocked when in close proximity, and since I don't want to shell out a ton of money for a watch, is there a Bluetooth device I could just clip to my key ring that would work? Something that would not need to be charged up every day like my Bluetooth headset does?